Drilling mechanism



June 3, 1930. E. r. HALL DRILLING MECHANISM Filed March 30, 1926 2 Sheets-Sheet l MAM June 3, 1930. E. T. HALL 1,761,337

DRILLING MECHANISM Filed March 50, 1926 I 2 Sheets-Sheet 2 f 1 j I a 10" li'iiiij gfijgifisgli; U 0/ I 5 fig? 1 O qfiyjg fi 54 v 5 17 Q I 5 L J a" 10 9 W 56' 5M7 13 fl n 9 I V Inve 77/20 7':

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4M 4 2M K Patented June 3, 1930 entree srarrs' PATENT orricr Y EDWIN T. HALL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPQBATION OF MASSACHUSETTS DRILLING MECHANISM Application filed March so, 1926. Serial No 98, 59 9.

This invention relates to drilling mechanisms and more particularly to rock drilling mechanisms of the fluid pressure actauted percussive type.

In modern quarrying it is the usual practice to drill a series" of alined holes in the rock by means of a hammer drill mounted on a usual quarry bar. After the holes are drilled a broaching tool is substituted for the drilling tool and the partitions between the holes are broached or cut away,- thereby producing a continuous .cut or channel inthe rock. The desired section or block of the rock is then split away in a well known manner.

"The main objectof this invention is to provide an improved drilling mechanism whereby a plurality of holes may be simultancously drilled in the rock, thereby substan tially decreasing the time consumed in separating a section ofthe rock from its natural bed. Another object of this invention is to provide an improveddrill mounting whereby a plurality of unitary drilling tools may be mounted on a common support in an improved and simplified manner. Another object o1 this invention is to provide improved guiding means for the cutting tools during the starting orspotting of a hole. These and other objects of this invention will, however, hereinafter more fully appear.

This invention in one of its preferred embodiments may comprise a pair of unitary percussive rock drillingitoolshaving a common control and fluid supply connection and these drilling tools be secured in an improved manner on a common support or cradle, the latter being slidably mounted in a guiding frame. Means may be provided for simultaneously feeding thedrllls and cradlerelative to the guiding frame and such means preferably comprises a rotatable feed screwcarried by the guiding frame and'cooperating with a stationary feed nut carried by thedrill cradle. Improved means are also provided for guiding the cutting tools of the drills and such means include, a guiding member so, cured to the guiding frame-andhaving pore tions embracing both of the cutting tools.

In. thaaccompanying drawings there is Fig. 1 is a plan view of the improved drill- 1 ing mechanism, parts being broken away to facilitate illustration.

Fig. 2 is a central longitudinal sectional view taken substantially on line 22 of Fig. 1. Fig. 3'is an end view of the mechanism shown in Fig.1. Fig. 4 is a transverse vertical sectional view taken substantially on line 4-4 of Fig 2, the drilling tools being omitted to facilitate illustration. v

Fig. 5 is detail transverse horizontal sectional view taken substantially on line 5+5 of Fig.3. i V Fig. 6 is a detail transverse vertical sectional view taken substantialy on line 66 "of Fig. 1, illustrating the guiding means for the cutting tools.

Figs. 7 and 8 are detail views illustrating two modifications of the uiding means for the cutting tools. V

In the illustrative embodiment of the in vention shown in Figs. '1 to 6 there is provided a pair of unitarydrilling tools geneu ally designated 1 and 2 of identical structure which are suitably secured to a cradle 3slidably mounted on a guiding frame or shell 4. The "drilling tools 1 and 2are" herein of the fluid pressure actuated percussive type each of which has a cylinder 5v within which a hammer piston, not shown, is reciprocable, this hammer. piston being adapted to percussively actuate a drill steel 6 loosely supported within the forward end of the drilling tool in a usual manner. Fluidpressure is adapted to be supplied to thecylinders 5 through a cylinder heads 11. Fluid pressure is adapted to flow from the supply line 7 through a paspassages 15 and. -16 which communicate :sage 12 communicating with a usual'three through passages formed in the rear heads 11 with usual valve mechanisms 16, the latter including a usual automatic valve which distributes the fluid to and from the motor cylinders in a well known manner. As the specific internal structure of these drilling tools does not enter into this invention, further detailed description and illustration of the same is deemed unnecessary. It will be evident that the three way valve 13 is adapted to selectively or simultaneously supply pressure fluid to the cylinders of the drilling tools, a controlling lever 17 being suitably secured to the valve to permit manipulation thereof. In accordance with this invention, the drilling tools 1 and 2 are disposed on their sides with their bottom surfaces adjacent each other and disposed in a vertical plane, the cylinders 5 of these drilling tools having formed thereon lateral guiding members or gibs 18 which are disposable at their opposite ends in recesses 19 and 20 formed within the end portions ofthe cradle member 3. To prevent displacement of the gibs 18 from these recesses 19 and 20 there is provided a detachable cap member 21 suitably secured, as by screws 22, to the upper surface of the cradle 3 and this cap member has formed therein a longitudinally extending recess or slot 23 and the sides of this member 21 are adapted to embrace the upper portions of the gibs to secure the drilling tools in operative position on the cradle. A screw 24 carried by the member 9 is also provided which threadedly engages the cradle 3, as at 25, and this screw 24 cooperates in the holding of the drilling tools in position on the cradle. From the foregoing description it is evident that upon the removal of the cap member 21 and the screw 24 the drilling tools 1 and 2 may be lifted bodily from the cradle 3, thereby greatly facilitating the dismantling of the machine in case of breakage or wear of the parts thereof. As illustrated, formed on the lower portion of the cradle member 3 are laterally projecting gibs or guiding members 26 (see Fig. 4) which are slidably mounted in guideways 27 formed integral with and extending longitudinally of the guiding frame 4. To effect the feeding of the cradle member and consequently the drilling tools relative to the guiding frame 4 there is provided a rotatable feed screw 28 journaled at its rear end within a yoke member 29 supported on the guiding frame 4'by means of spacers 3O and side rods. 31. The. forward end of the feed screw 28 is rotatablycmounted within a bearing member 32 likewise secured in position on the guiding frame 4 by the side rods 31. In this instance, the rear end of the feed screw 28 has suitably secured thereto an op.- erating crank 33 bymeans of which the operator'may rotate the feed screw. Threadedly connected to the feed screw 28 is a non-ro- 36 formed integral with the cradle member 3. Formed integral with the guiding frame 4 is a supporting member 37 by means of which the drilling mechanism may be clamped in operative position on a column or quarry bar in a well known manner. In accordance with this invention improved means are provided for guiding the drill steel 6 during the starting or spotting of a hole and such means comprises an elongated supporting member 38 having a rectangular end portion 39 which is adapted to lit in a polygonal socket 40 formed within the member 32. The member 38 projects forwardly from the forward end of the guiding frame 4 and has secured, as by bolts 41, at its outer end a member 42 which has laterally projecting bent portions 43 which are adapted to embrace and guide the drill steels 6.

In the modified form of guiding means shown in Fig. 7, there is provided guiding means for the drill steels (i which is operative when the mechanism shown in Fig. 1 is turned on its side, the drill steels being in a superimposed position at that time. In this instance, the elongated supporting member 38 has secured thereto at its forward end as by bolts 44 a vertically disposed member 45 hav ing formed thereon at its upper and lower ends laterally projecting bent portions 46 which embrace and guide the drill steels 6. In the modified form of guiding structure shown in Fig. 8 there is also shown a projecting portion 47 formed integralwith the bearing member 32 and the outer end of this portion 47 has pivoted thereon, as at 48, an elongated supporting member 49 which has secured thereto at its outer end, as by bolts 50, the drill steel embracing and guiding means 51 which is similar to the guiding member 42 asshown in Fig. 6. Formed on the member 49 and projecting rearwardly from the pivot 48 is an arm 52 through which and the portion 47 a pin 53is adapted to project and this pin locks the member 49 in its operative position as clearly shown in full lines in Fig. 8. When it is desired to remove the drill steels 6 from the drilling tools, the pin 53 may be removed and the member 49 swung downwardly to the position indicated by dotted lines in Fig. 8, thereby removing the embracing or guiding portions of the member 51 from adjacent the drill steels 6.

The operation of this improved drilling mechanism is as follows. After the drilling mechanism has been suitably mounted upon a column or quarry member and the cutting ends or bits of the drill steels 6 are suitably 13, thereby supplying pressure fluid to the I" ed, and meanslfor feeding tive to said guidingframe valve mechanismslli of the drilling tools 1 and 2 andthe hammer pistonsare consequently reciprocated in their cylinders and thereby impart blows to the shanks of the drill steels 6. The operator then suitably manipulates the leverSB, therebyefifecting rotation of the feed screw 28 and oonsequentlyfeeding the the spotting of the holes. i

As result of this invention, it will be note that an improved drilling mechanism 1s pro- 'vided wherein a plurality of holes may be simultaneously drilled and such mechanism is mounted upon a common supporter guiding frame. It will alsobe noted that the unitary drilling tools are mounted on the guiding frame in an improved and simplified manner, it being possible to detach the drilling tools from the supporting cradle with facility. It will further be noted that improved and simplilied guiding meansare provided for the drill steels during the starting or spotting of the holes; These and other advantages of this invention will be clearly apparent to those skilled in the art. a

While I have in thisapplication specificah ly described several embodiments which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied.

in various other forms without departing from its spirit or the scope of the appended claims. i r

What I claim as new and by Letters Patent is: I

1. In a drilling mechanism, a plurality of desire to secure unitary'drilling tools each having gibs' secured thereto at thebottom thereof, a cradle having means cooperating with said gibs for maintaining said tools in juxtaposition with their bottoms parallel toa vertical plane and immediately adj acent, eachothena guiding frame on which said cradle is slidably mounted, and means for] feeding said cradle relative to said guiding frame. 9 1

'2; In a drilling mechanism, a plurality of unitary drillingtools; eachhavinggibs secured thereto at the bottom thereof, a cradle having means including longitudinally Qextending recesses and a l cooperating jclamp longitudinally extendingfwith said gibs :for maintaining said tools injuxtaposition with their bottoms parallel to a vertical plane and immediately adjacent eachother, a guiding frame on which said frame is slidablymountsaid cradle rela r 3. In adrilling mechanism, a plurality of unitary fluid actuated drilling tools of like construction, a common fluid conducting member rigidly connected to said tools, and a common valve for controlling fluid flow through said member to both tools, a cradle on which said tools are mounted in juxtaposition, a guiding frame on which said cradle is slidably mounted, and means for feeding said cradle and tools simultaneously relative to said guiding frame.

l. In a drilling mechanism, a pair of unitary'fluid actuated drilling tools of like construction, a fluid conducting member rigidly connected to both tools, and a common valve in said member for controlling fluid flow through said member to both tools, a cradle on which said tools are mounted in juxtapositi'on, said fluid conducting member being rigidly secured to said cradle, a guiding frame on which said cradle is slidably mounted, and means for feeding said cradle and tool'ssimultaneously relative to guiding frame.

5. In a drilling mechanism, a plurality of unitary drilling tools each having'a drillv steel, cradle having means for supporting said tools thereon in immediately adjacent relation, a guiding frame on which said cradle is slidably mounted, means for feeding said cradle relative to said guiding frame, and a single means carried by said frame for guiding all of said drill steels.

G. In a drilling mechanism, a pair of unitary drilling tools each having a drill steel, a

cradle having means for. supporting .said

tools thereon in immediately adjacent relation, a guiding frameonwhich saidcradle is slidably mounted, means for feeding said cradle relative to said guiding frame, and means carried by said frame for guiding both of saiddrill steels including a single element projecting forwardly from the front end of said guiding frame and having portions embracing both of said drill steels.

7. In a drilling mechanism, a'plurality of unitary drills of the percussive type, a cradle to which said tools are secured with their bases closely adjacent one another, means for securing said tools on said cradle including a recess on said cradle for engagement with portions of both of said .tools', and means removably connected to saidoradle and engaging both of said tools for cooperation with said recesses to hold said drilling tools in position, ,a guiding frame .on which said cradle is slidably mounted and means for feeding said cradle relative to said frame.

8. In a drilling mechanism, a plurality of drilling tools, a mounting for said tools comprising a cradle, 21 single removablelretaining meansforsecuring both of said drillingtools irectly to said cradlewith the basesof said tools vertically disposed adjacent one another, a guidingframe on which saidcradle is slidill) 'iii

ably mounted, and means for feeding said cradle relative to said frame.

9. In a drilling mechanism, a pair of separable unitary drilling tools of the percussive type, a cradle, means for securing each of said tools in direct engagement with said cradle, including a single removable clamping means engaging both of said tools, the bases of the tools being disposed in substantially abutting relation in tho longitudinal center of the mechanism. a guiding frame on which said cradle is mounted, and means for feeding said cradle relative to said guiding frame.

10. In a drilling mechanism, a pair of unitary drilling tools, a cradle, means for securing said tools with their bases together on said cradle comprising recesses in the cradle each of which receives portions of both of said tools therein, and clamping means engaging other portions of said tools and connected to said cradle for holding said tools in engagement with the recesses and maintaining the bases of said tools in substantially abutting relation, a guiding frame on which said cradle and tools are movably supported, and means for feeding said cradle and tools relative to said support.

11. In a drilling mechanism, a plurality of unitary drilling tools, a cradle, clamping means common to both of said tools for clamping the bases of said tools substantially'tog'ether in immediately adjacent relation and securing them on the cradle, a guiding frame on which the cradle is slidably mounted, and means for simultaneously feeding the tools relative to the guiding frame.

12. In a drilling mechanism, a plurality of unitary drilling tools of the fluid actuated percussive type each provided with its own distributing valve, a fluid conducting member connected to each of said tools and providing a common fluid supply to all of said distributing valves, a single means for controlling the flow of fluid to all said valves, a cradle, means for detachably securing said fluid conducting member directly to said cradle, a guiding frame to which said cradle is slidably connected, and means for feeding said tools in unison relative to said frame.

13. A mounting for a plurality of rock drills, comprising in combination with cylinders having lateral projections, a carriage, bearings on the carriage to support the drills, and a common clamping means pressing on the projections to hold the drills against movement with respect to the carriage. 14. In a drilling mechanism, a plurality of unitary drilling tools each being of the drifter type and having longitudinally extending gibs or guides adapted to cooperate with guideways on a shell when used as separate mounted drills, a common cradle for receiving all of said tools in parallel relation, clamping means engaging each of said tools to secure them on said cradle, a guiding frame on which said cradle is slidably mounted, and means for feeding said cradle relative to said frame to feed said tools uniformly to the work.

15. Ina drilling mechanism, a plurality of unitary drillin tools each being of the drifter type and having longitudinally extending gibs or guides adapted to cooperate with guideways when used as separate mounted drills, a common cradle for receiving all of said tools in parallel relation with the bottom surfaces of said gibs or guides in abut ting relation, clamping means engaging the gibs on each of said tools to secure them on I said cradle, a guiding frame, and means for feeding said cradle relative to said guiding frame to feed said drilling tools uniformly to the work.

16. In a drilling mechanism, a plurality of unitary drilling tools each being of the drifter type and having longitudinally extending gibs or guides adapted to cooperate with guideways on a shell when used as separate mounted drills, a cradle to which said tools are secured with said gibs arranged in parallel relation and directly opposite each other, clamping means engaging each of said tools to secure them on said cradle, a fluid conducting member rigidly connected to both tools, and a common valve for controlling fluid flow through said member to both tools, a guiding frame on which said cradle is slidably mounted, and means for feeding said cradle relative to said guiding frame to feed said drilling tools uniformly to the work.

17. In a drilling mechanism, a plurality of unitary drilling tools each having a drill steel, a cradle having means for supporting said tools in parallel relation thereon, a guiding frame on which said cradle is slidably mounted, means for feeding said cradle relative to said guiding frame to feed said drill steels uniformly into the Work, and a single drill steel guiding means carried by said frame for guiding all of said drill steels.

1.8. In a drilling mechanism, a pair of unitary drilling tools each having a drill steel, a cradle for supporting said tools in parallel relation thereon, a guiding frame on which said cradle is slidably mounted, means for feeding said cradle relative to said guiding frame to feed the drill steels uniformly into the work, means carried by said guiding frame for guiding both of said drill steels including an element rigidly connected to the guiding frame, a member pivotally connected to said element and having means for embracing both of said drill steels, and retaining means for holding said pivoted member in operative position.

19. In a drilling mechanism, a pair of unitary drilling tools each having a drill steel, a cradle having means for supporting said tools in parallel relation thereon, a guiding frame on which said cradle is slidably mounted, means for feeding said cradle relative to said guiding frame to feed said drill steels uniformly into the Work, a single drill steel guiding means carried by said frame and extending materially beyond the end of the frame comprising a member rigidly connected to the guiding frame, a second member connected to said first member and carrying guide means embracing both of said drill steels, said second member being swingable relative to said first member to permit removal oi the drill steels, and means for retaming said members in 'fixed relation to 15 hold said guides in operative position.

In testimony whereof I afiix my signature.

EDWIN T. HALL.

CERTIFICATE OF CORRECTION.

Patent No. 1,761,337. Granted June 3, 1930, to

EDWIN T. HALL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 3, for the misspelled word "actauted" read "actuated"; page 3, lines 58 and 59, claim 2, for "cooperating clamp longitudinally extending" read "longitudinally extending clamp cooperating"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the-record of the case in the Patent Office.

Signed and sealed this 22nd day of July, A. D. 1930.

Wm. A. Kinnan, (Seal) Acting Commissioner of Patents. 

